the topic fires up all over the country. the battle lines on gun laws are in congress. >> reporter: after outlining proposals to diminish gun violence president obama signed executive actions aimed at strengthening gun laws. >> we'll make its easier to keep guns out of the hands of criminals by strengthening background checks. >> reporter: that requires congressional action as does the call for the re-instatement on the ban of military-style assault weapons and trafficking laws. >> there is a need for an assault weapons ban. >> reporter: while some mayors immediately supported the measure some lawmakers are opposed. >> the shooting in connecticut lead to this. nothing is proposed could have prevented connecticut. >> reporter: nra is proposing an epic battle. >> this is less about protecting our children than it was about using our children to promote an antigun agenda. >> reporter: some lawmen are vowing to ignore the restrictions. >> i don't think it is reasonable for anyone to think i'll enforce federal gun laws in my coun